Home / 21,516.92-29,701.81-13,557.66

Finding the Fourth Proportional to 21,516.92, 29,701.81 and 13,557.66

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Solution

The fourth proportional to 21,516.92, 29,701.81 and 13,557.66 is: 18,714.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,516.92 : 29,701.81 = 13,557.66 : x
  2. Step 2: Convert to fraction form
    21,516.92/29,701.81 = 13,557.66/x
  3. Step 3: Cross multiply
    21,516.92x = 29,701.81 × 13,557.66
  4. Step 4: Simplify right side
    21,516.92x = 402,687,007.47
  5. Step 5: Solve for x
    x = 402,687,007.47/21,516.92
  6. Step 6: Final answer
    x = 18,714.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.